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Publications - 6374

One-at-a-Time sensitivity study of a tree burning simulation

László Környei F. Hajdu Rajmund Kuti

Publication Name: Pollack Periodica

Publication Date: 2024-03-22

Volume: 19

Issue: 1

Page Range: 53-59

Description:

The aim of the research was to carry out the One-at-a-Time sensitivity analysis of a tree burning experiment simulation with a novel fuzzy logic-based method. It was observed that the precent of the remaining tree is sensitive to the moisture content, the crown-base diameter and the tree height. The other variables, which are maximum mass loss rate, maximum heat release rate, and maximum temperature at the top of the tree are moderately sensitive or not sensitive to the selected parameters. The presented results can be used in sensitivity studies and wildfire simulations.

Open Access: Yes

DOI: 10.1556/606.2023.00850

Beyond 160 applications of an expert system: Key to a better usability

Gabriella Toth-Haasz Zoltán Baracskai

Publication Name: 11th IEEE International Conference on Cognitive Infocommunications Coginfocom 2020 Proceedings

Publication Date: 2020-09-23

Volume: Unknown

Issue: Unknown

Page Range: 563-568

Description:

The most influential relevant thinkers have complained of the 'poverty' of Expert Systems (ES) both in the past (Dreyfus and Dreyfus, 1986) and in recently studies as well (Müller and Bostrom, 2016). We developed our own AI-Based Expert System shell for rule-based and case-based reasoning three decades ago and now there are 160 Knowledge Engineering (KE) process behind us with this system. We hope that this experience give us the right to formulate an opinion about that what is the key to a better usability and user experience in understanding of the result of the decision making process. While we do not think that ES is an omnipotent panacea, we also do not think that its applicability is determined only by the shell capabilities. However, one ability is essential; namely, presenting the result as simply as possible in order to that the decision-maker also can understand it. Our finding is that ES shells are only able to be transparent if they are designed by people who have an understanding of the human thinking process instead of a strong math-based software development approach.

Open Access: Yes

DOI: 10.1109/CogInfoCom50765.2020.9237822

Industry 4.0 in Germany, Austria and Hungary: Interpretation, strategies and readiness models

No authors available

Publication Name: 16th IMEKO TC10 Conference 2019 "Testing, Diagnostics and Inspection as a Comprehensive Value Chain for Quality and Safety"

Publication Date: 2019-01-01

Volume:

Issue:

Page Range: 71-76

Description:

Global economy increasingly responds to trends of industrial digitization and start to develop their own digitalization strategies e.i. through application of Industry 4.0 concepts. Thereby, initiatives and developments are often carried out on a company-, industry- or country-level, which can result in a lack of international co-operation and utilization of synergy-effects. To analyse the Industry 4.0 development status on a macro level and to enhance transnational developments, in the first part of this study we introduce the national Industry 4.0 platforms of three EU member states – the frontrunner Germany, the solidly rising Austria and Hungary that is in the process of catching up. Our analysis are carried out in four dimensions: economic background, country-specific Industry 4.0 interpretation, and local platforms as well as initiatives. To analyse the actual Industry 4.0 development status of industrial enterprises and of development platforms, existing Industry 4.0 maturity models form all three countries are presented and compared. Our analysis helped to capture the different phases of digitization and Industry 4.0 in Germany, Austria and Hungary in regard to defined goals and strategies and further of resulting problems with respect to Industry 4.0. Building on our comparison-studies and captured problems, decision makers should be enabled to carry out transnational Industry 4.0 projects and initiatives more effectively.

Open Access: No

DOI: DOI not available

Experimental investigation of single point incremental forming of aluminium alloy foils

No authors available

Publication Name: 16th IMEKO TC10 Conference 2019 "Testing, Diagnostics and Inspection as a Comprehensive Value Chain for Quality and Safety"

Publication Date: 2019-01-01

Volume:

Issue:

Page Range: 50-55

Description:

Incremental Sheet Forming is a prosperous process to manufacture sheet metal parts that is well adapted for prototypes or small batch production. Compared to traditional sheet forming technologies this relatively slow process is only profitable for the above mentioned production types but it can be used in different applications in automotive and aircraft industries, in architecture engineering and in medical aids manufacturing. In this paper indirectly obtained axial forming force on Single Point Incremental Forming (SPIF) of variable wall angle geometry were studied under different process parameters. The estimation of the forces on AlMn1Mg1 sheets with 0.22 mm initial thickness is performed by continuous monitoring of servo motor currents. The deformation states of the formed parts were analysed using the ARGUS optical strain measurement system of GOM. Interaction plot of forming speed, incremental depth, tool diameter and lubrication were also reported.

Open Access: No

DOI: DOI not available

Renaming States—A Case Study: Changing the Name of the Hungarian State in 2011. Its Background, Reasons, and Aftermath

Péter Takács

Publication Name: International Journal for the Semiotics of Law

Publication Date: 2020-09-01

Volume: 33

Issue: 3

Page Range: 899-927

Description:

A provision of the Hungarian constitution, adopted in 2011, has renamed the state. The name changed from the Republic of Hungary to Hungary, while the form of the state has remained “republic”. The purpose of this study is to explore the meaning, significance, and several consequences of this provision. The analysis consists of three main parts. The first one gives a general overview of the functions of the names of states. It claims that not only names but also changing or modifying names of states—taking place either by name-giving or by shaping convention—can serve certain functions. The second part focuses on the historical and constitutional details of renaming the Hungarian state, and summarizes the legal context that provided the framework for the 2011 renaming. The third part outlines the arguments for the change, takes a look at the official justification and actual reasons, and reveals some of the consequences of the name change in the past decade. The main contention of the paper is that the renaming of the Hungarian state that took place in 2011 lacked any overt and reasonable justification, and is best explained as an expression of anti-republican sentiment, which indicated, and partly paved the way for the transition into a kind of an authoritarian regime. Finally, the study raises a possible interpretation of the renaming of the Hungarian state in 2011, the point of which is that it adumbrated many later changes in public law and political systems.

Open Access: Yes

DOI: 10.1007/s11196-020-09692-y

Lignocellulosic agro-residue/polylactic acid (PLA) biocomposites: Rapeseed straw as a sustainable filler

László Lendvai

Publication Name: Cleaner Materials

Publication Date: 2023-09-01

Volume: 9

Issue: Unknown

Page Range: Unknown

Description:

The main objective of this study is to review the applicability of rapeseed straw (RSS) as a sustainable filler material in polylactic acid (PLA)-based biocomposites. The effect of different RSS particle sizes and concentrations (0–20 wt%) on the mechanical, morphological, thermal, and water absorption properties was investigated. The composites were fabricated by melt compounding using a twin-screw extruder followed by injection molding. The mechanical properties were analyzed through tensile and flexural tests and Charpy impact tests. The morphology of the samples was investigated by scanning electron microscopy (SEM). The thermal properties and the crystallinity of the composites were determined through differential scanning calorimetry (DSC). Mechanical properties revealed an increasing stiffness of PLA as a function of RSS loading, albeit at the cost of strength. SEM images have shown a limited interfacial adhesion between PLA and the straw, which was suggested to be responsible for the decreased strength values. Based on the DSC measurements, the RSS fibers facilitated the nucleation in the composites, thereby decreasing the cold crystallization temperature of PLA. The conducted experiments demonstrated that environmentally friendly and economically attractive biocomposites can be fabricated by substituting part of the PLA with RSS as a lignocellulosic by-product.

Open Access: Yes

DOI: 10.1016/j.clema.2023.100196

Finite Element Simulation of Surface-Mount Resistor Solder Joint Quarter Models Under Thermomechanical Loading †

Antal Bakonyi Norbert Kiss Dániel Székely Matthew Joshua Sandy Yashveer Dunputh Mahmud M.D. Firoz

Publication Name: Engineering Proceedings

Publication Date: 2025-01-01

Volume: 113

Issue: 1

Page Range: Unknown

Description:

Virtual lifetime estimation is growing in importance, as replacing physical tests by simulations leads to cost reductions in the development of microelectronics assemblies. However, the predictions made by fatigue models often differ significantly from the lifetimes recorded in physical tests. Tuning these models is not straightforward, and results are often accurate only in specific test cases. Deviations may arise from manufacturing tolerances in the soldering process which can lead to deviations in the solder joint geometry. These include variations in the size of the copper pad area or in the volume of solder material. These factors, which have impacts on estimated lifetimes, are not fully understood. This paper assesses the impact of solder geometry in parallel with that of thermal cycling properties on estimated lifetimes. It is demonstrated that the shape and thermocycling properties of the solder joint significantly affect the thermomechanical lifetimes of surface-mounted resistors.

Open Access: Yes

DOI: 10.3390/engproc2025113050

Leveraging Industry 4.0 Technologies in the Food Sector to Reduce Poverty (SDG 1)

Zuhaib Bhat Abdo Hassoun Mohamed Buheji Abderahman Rejeb Tarek Ben Hassen

Publication Name: Sustainable Development Goals Series

Publication Date: 2025-01-01

Volume: Part F1068

Issue: Unknown

Page Range: 51-67

Description:

This chapter examines how fourth industrial revolution (Industry 4.0) technologies can serve as powerful enablers for poverty reduction by transforming the food sector, in alignment with Sustainable Development Goal 1 (SDG 1). Recognizing poverty as a multidimensional challenge, the chapter focuses on the role of recent technological innovations, such as artificial intelligence, the Internet of Things, blockchain, and big data, among other Industry 4.0 technologies, in revolutionizing agriculture and the food industry. These innovative advances offer significant potential to enhance productivity, optimize resource use, reduce post-harvest losses, and increase market access for smallholder farmers and food producers. Through a literature review, the chapter outlines mechanisms by which Industry 4.0 can generate inclusive employment and elevate incomes in rural and underserved communities. The findings emphasize that effective digital transformation in the food sector requires targeted investments in infrastructure, skills development, supportive policy frameworks, and multi-stakeholder collaboration. By strategically leveraging Industry 4.0 innovations, the food system can become a critical vehicle for sustainable, inclusive economic development and long-term poverty alleviation.

Open Access: Yes

DOI: 10.1007/978-3-032-06527-8_3

Health status of Hungarian ambulance workers in the COVID-19 era

Bálint Bánfai Emese Sánta Kitti Máté-Póhr Balázs Mátrai József Betlehem

Publication Name: Orvosi Hetilap

Publication Date: 2024-10-27

Volume: 165

Issue: 43

Page Range: 1707-1713

Description:

Objective: The study aimed to assess the physical and mental health status of active ambulance workers concerning the additional workload they are facing due to the coronavirus pandemic. Data and methods: A cross-sectional survey was conducted with 130 Hungarian National Ambulance Service em¬ployees (n = 130) in the first quarter of 2023, using an online questionnaire on a voluntary, anonymous basis. After convenience sampling, physical and mental health were assessed using the SF-36 questionnaire, along with questions on musculoskeletal status and experience of the COVID-19 pandemic. SPSS was used for data analysis, with descrip¬tive and mathematical statistical tests. The results were significant at p<0.05. Results: The ambulance workers considered their "Physical functioning"to be the best (mean 90.7 ± 13.2 points) and their "General health"to be the worst (55.4 ± 9.5 points). The dimensions were correlated (p<0.001). 73.1% of the sample had a musculoskeletal complaint in the last 5 years, with the highest proportions in the back area (56.8%) and spine (51.5%). These ambulance workers rated their "Physical Functioning"significantly worse (p = 0.002). 95 persons were registered as COVID-19-infected, 50% of whom were only slightly or not at all affected by the pandemic (mean 2.6 ± 1.2). The experience of the coronavirus had a negative impact on the dimensions "Vitality"(r = -0.204, p = 0.020), "Emotional role"(r = -0.317, p<0.001) and "Mental health"(r = -0.283, p = 0.001). Persons with residual symptoms of COVID-19 rated their "Physical functioning"(p = 0.015), "Physical pain"(p = 0.010), "Social functioning"(p = 0.001), and "Mental health"(p = 0.023) dimensions worse. Conclusion: The sudden increase in workload caused by the pandemic makes it essential to monitor ambulance work¬ers' health closely. Residual symptoms of the coronavirus and concomitant musculoskeletal disorders can compro¬mise the quality of patient care.

Open Access: Yes

DOI: 10.1556/650.2024.33152